Rotary Rebuild Completed

Ed Anderson wrote:


 Subject: Rotary Rebuild Completed

Ed Anderson wrote:


Hi Folks,

    Just finished putting the 91 Turbo back together.  Ed Heishmann,

Florida welder recommended by Charlie Kuss, did an excellent job on

my

new

oil pan.  It was returned ....


BIG SNIP

drive.


Will send some photos when I get them back.

Should have the engine reinstalled within a week or two

Best Regards

Ed Anderson
Matthews, NC


Jim M wrote:


Hi Ed

Glad to hear you got your pan back, sounds like its pretty. What are

these

EGR holes you were Plugging in the exhaust and what does EGR  stand for?

Neil and I found out why my V belts came adrift. We discovered today

that

the water pump was jamming. I removed the water pump pulley and found a
broken  hunk of a 6 MM bolt jammed between the inside of the double top

hat

pulley and the casting , it had been rattling around in there since day

one.

I guess someone in its other life had sheared one of the pulley bolts

and

never looked for the broken piece. So it looks like it was not a $6.00 v
belt that has cost me 2 grand but a 10 cent bolt.

I'll keep you posted when my engine comes back.

Jim Mosur

 Hi Jim,
    Yes, the pan is much better and incorporating the coolant header,
overflow and air/oil separator tanks all on the oil tank has cleaned up my
installation a bit.

   Exhaust Gas Recirculation (EGR), some emission control routing of diluted
exhaust gas either to mix back into the intake and/or to provide additional
heat for the intake manifold.  I presume the former as coolant is used to
heat the manifold.  In any case, there are some small (approx 1/4" dia holes
in the exhaust sleeve which route under the sleeve in the rotor to the
inside edge of the rotor housing. There is a hole at the bottom of the rotor
housing that dumps this gas in to a triangular shaped cavity at the bottom
of the housing (manifold sided) which in turn routes into a similar cavity
into the central housing and then in the turbo IIs there is a rectangular
shaped hole that matches with a similar hole in the intake manifold.  This
is one way you can tell a front from a rear rotor housing.  The triangular
cavity in the bottom of the housing (there is one on each side of the
housing) the one that should point to the center housing has a hole from
exhaust sleeve and is usually very sooty with carbon and the cavity on the
other side (points toward the ends of the engine) is usually clean)

   In any case, the hot exhaust gas does nothing for our installation in an
aircraft except heat up the rotor and manifold.  So I followed a suggestion
by Tracy and plugged the hole and filled the cavity in the rotor housing
with ceramic potters clay.  Racing Beat also recommends this modification.

   Boy, what a shame to think that someone would break a bolt and then not
recover it.  Sounds like all they would have needed to do was take the
pulley off (what 4 or 6 small bolts) to recover the broken bolt.
Unbelievable that it would run this many hours before deciding to do $2000
worth of damage.  You would have though it would have fallen out or jammed
before now.  But, it sounds like this malfunction would account for both
belts leaving their sheaves rather than one belt taking the other belt out
as well.  I have had belts break on cars but never had one take an adjacent
belt out.  So thanks for the info, it at least makes me feel somewhat better
than two belts are worthwhile.

   While I still have some of the clean up fittings to get completed, I plan
on taking the engine out and installing it back on the aircraft this coming
week.  But, won't be able to fire it up until I get the new header tank
welded.  One of these days, I am going to learn how to weld!

Ed Anderson



 
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